/*
* Copyright 2011 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Ben Skeggs
*/
#include "priv.h"
#include <core/option.h>
static int
nvkm_gpio_drive(struct nvkm_gpio *gpio, int idx, int line, int dir, int out)
{
return gpio->func->drive(gpio, line, dir, out);
}
static int
nvkm_gpio_sense(struct nvkm_gpio *gpio, int idx, int line)
{
return gpio->func->sense(gpio, line);
}
void
nvkm_gpio_reset(struct nvkm_gpio *gpio, u8 func)
{
if (gpio->func->reset)
gpio->func->reset(gpio, func);
}
int
nvkm_gpio_find(struct nvkm_gpio *gpio, int idx, u8 tag, u8 line,
struct dcb_gpio_func *func)
{
struct nvkm_device *device = gpio->subdev.device;
struct nvkm_bios *bios = device->bios;
u8 ver, len;
u16 data;
if (line == 0xff && tag == 0xff)
return -EINVAL;
data = dcb_gpio_match(bios, idx, tag, line, &ver, &len, func);
if (data)
return 0;
/* Apple iMac G4 NV18 */
if (device->quirk && device->quirk->tv_gpio) {
if (tag == DCB_GPIO_TVDAC0) {
*func = (struct dcb_gpio_func) {
.func = DCB_GPIO_TVDAC0,
.line = device->quirk->tv_gpio,
.log[0] = 0,
.log[1] = 1,
};
return 0;
}
}
return -ENOENT;
}
int
nvkm_gpio_set(struct nvkm_gpio *gpio, int idx, u8 tag, u8 line, int state)
{
struct dcb_gpio_func func;
int ret;
ret = nvkm_gpio_find(gpio, idx, tag, line, &func);
if (ret == 0) {
int dir = !!(func.log[state] & 0x02);
int out = !!(func.log[state] & 0x01);
ret = nvkm_gpio_drive(gpio, idx, func.line, dir, out);
}
return ret;
}
int
nvkm_gpio_get(struct nvkm_gpio *gpio, int idx, u8 tag, u8 line)
{
struct dcb_gpio_func func;
int ret;
ret = nvkm_gpio_find(gpio, idx, tag, line, &func);
if (ret == 0) {
ret = nvkm_gpio_sense(gpio, idx, func.line);
if (ret >= 0)
ret = (ret == (func.log[1] & 1));
}
return ret;
}
static void
nvkm_gpio_intr_fini(struct nvkm_event *event, int type, int index)
{
struct nvkm_gpio *gpio = container_of(event, typeof(*gpio), event);
gpio->func->intr_mask(gpio, type, 1 << index, 0);
}
static void
nvkm_gpio_intr_init(struct nvkm_event *event, int type, int index)
{
struct nvkm_gpio *gpio = container_of(event, typeof(*gpio), event);
gpio->func->intr_mask(gpio, type, 1 << index, 1 << index);
}
static const struct nvkm_event_func
nvkm_gpio_intr_func = {
.init = nvkm_gpio_intr_init,
.fini = nvkm_gpio_intr_fini,
};
static void
nvkm_gpio_intr(struct nvkm_subdev *subdev)
{
struct nvkm_gpio *gpio = nvkm_gpio(subdev);
u32 hi, lo, i;
gpio->func->intr_stat(gpio, &hi, &lo);
for (i = 0; (hi | lo) && i < gpio->func->lines; i++) {
u32 mask = (NVKM_GPIO_HI * !!(hi & (1 << i))) |
(NVKM_GPIO_LO * !!(lo & (1 << i)));
nvkm_event_ntfy(&gpio->event, i, mask);
}
}
static int
nvkm_gpio_fini(struct nvkm_subdev *subdev, bool suspend)
{
struct nvkm_gpio *gpio = nvkm_gpio(subdev);
u32 mask = (1ULL << gpio->func->lines) - 1;
gpio->func->intr_mask(gpio, NVKM_GPIO_TOGGLED, mask, 0);
gpio->func->intr_stat(gpio, &mask, &mask);
return 0;
}
static const struct dmi_system_id gpio_reset_ids[] = {
{
.ident = "Apple Macbook 10,1",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro10,1"),
}
},
{ }
};
static enum dcb_gpio_func_name power_checks[] = {
DCB_GPIO_THERM_EXT_POWER_EVENT,
DCB_GPIO_POWER_ALERT,
DCB_GPIO_EXT_POWER_LOW,
};
static int
nvkm_gpio_init(struct nvkm_subdev *subdev)
{
struct nvkm_gpio *gpio = nvkm_gpio(subdev);
struct dcb_gpio_func func;
int ret;
int i;
if (dmi_check_system(gpio_reset_ids))
nvkm_gpio_reset(gpio, DCB_GPIO_UNUSED);
if (nvkm_boolopt(subdev->device->cfgopt, "NvPowerChecks", true)) {
for (i = 0; i < ARRAY_SIZE(power_checks); ++i) {
ret = nvkm_gpio_find(gpio, 0, power_checks[i],
DCB_GPIO_UNUSED, &func);
if (ret)
continue;
ret = nvkm_gpio_get(gpio, 0, func.func, func.line);
if (!ret)
continue;
nvkm_error(&gpio->subdev,
"GPU is missing power, check its power "
"cables. Boot with "
"nouveau.config=NvPowerChecks=0 to "
"disable.\n");
return -EINVAL;
}
}
return 0;
}
static void *
nvkm_gpio_dtor(struct nvkm_subdev *subdev)
{
struct nvkm_gpio *gpio = nvkm_gpio(subdev);
nvkm_event_fini(&gpio->event);
return gpio;
}
static const struct nvkm_subdev_func
nvkm_gpio = {
.dtor = nvkm_gpio_dtor,
.init = nvkm_gpio_init,
.fini = nvkm_gpio_fini,
.intr = nvkm_gpio_intr,
};
int
nvkm_gpio_new_(const struct nvkm_gpio_func *func, struct nvkm_device *device,
enum nvkm_subdev_type type, int inst, struct nvkm_gpio **pgpio)
{
struct nvkm_gpio *gpio;
if (!(gpio = *pgpio = kzalloc(sizeof(*gpio), GFP_KERNEL)))
return -ENOMEM;
nvkm_subdev_ctor(&nvkm_gpio, device, type, inst, &gpio->subdev);
gpio->func = func;
return nvkm_event_init(&nvkm_gpio_intr_func, &gpio->subdev, 2, func->lines, &gpio->event);
}
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